| 摘要 |
The data expanding circuit expands 8-bit data bus into 16-bit data bus which is applied to a circuit for interfacing a test bus distributing circuit and a TDX-10 test controller. The circuit includes a count enable circuit comprising an And gae for receiving address enable signal and strobe signal transmitted from a controller. D flip-flops (U1,U2) and AND gates (A2,A3), and multiple monostable circuit (12,13) comprising hexa decimal counter (U3,U5), 3/8 decoder (U4,U5), and an AND gate (A4) for transmitting data signal as acknowledge signal to the strobe signal and ready signal.
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